This site has some info. I went to this school once with my Judo club. http://www.nysambo.com/sambo/On the photo page, I think there is still a picture with me in it actually. It says Dec. 14th open mat photo. I am the one in the white Judo gi sitting in the middle.

Oh, come on... why would you study Sambo unless you are intend to fight? Should study authentic japanese martial arts instead. Slav culture is rather savage and it is very very well demonstrated in Sambo, why would one prefer that to the alternative that is presented in judo?

I can't speak for every Sambo club, but the one I went to seemed to be structured very similar to our Judo practices. We started with a warm up and uchi komi, then some mat fighting, then some instruction, and ended with throws/takedowns into mat fighting.